Key retainer



FIG. 1 is a view of a key retainer, showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a right end elevation view thereof;

FIG. 7 is a left end elevation view thereof; and,

FIG. 8 is an isometric view thereof showing an exemplary use of the key retainer.

The broken line showing in the Figures illustrates environment and forms no part of the claimed design. 

CLAIM The ornamental design for a key retainer, as shown and described. 